Fore-aal5-MIB

All MIBs › Fore-aal5-MIB

Organization: FORE

Last Updated: 1997-06-10

Category: ATM, Vendor: Fore Systems (ATM)

Description: Fore Systems ATM AAL5 (ATM Adaptation Layer 5) MIB providing per-VCC statistics for segmentation and reassembly of AAL5 PDUs on ForeRunner switches.

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What Is Fore-aal5-MIB?

Fore-aal5-MIB is a Fore Systems vendor MIB defining the AAL5 (ATM Adaptation Layer 5) management interface for the "Mercury" network module, which performs FUNI Frame-Relay/ATM interworking including EPD/PPD (early/partial packet discard) congestion controls at the per-VCC level. It exposes segmentation-and-reassembly statistics and discard-policy configuration for individual AAL5 virtual channel connections. As a result it functions as a performance and congestion-health monitor, letting an operator see per-VCC cell/frame discard behavior that reflects both hardware queue status and interworking software behavior on the Mercury module. It complements standard ATM MIBs (such as the IETF AToM MIB family) by adding FORE-specific EPD/PPD detail that those standards do not cover. It is used on ForeRunner switches carrying FUNI-to-ATM interworking traffic where congestion-related packet loss needs fine-grained per-connection visibility. Engineers can download the Fore-aal5-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in Fore-aal5-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

Fore Systems ForeRunner ATM switch (Mercury FUNI/ATM interworking module)

Monitoring Examples

No concrete object names were provided for this module, so a specific table/object-level polling scenario cannot be described honestly; in practice an operator would still expect to poll per-VCC AAL5 SAR statistics and EPD/PPD discard counters to detect congestion-driven frame loss on the Mercury FUNI/ATM interworking module. Because sample objects are unavailable, any more detailed object names would be speculative.

What Can Be Monitored

per-VCC AAL5 SAR statistics
EPD/PPD discard counts
FUNI/ATM interworking congestion state

Imported Objects

From Fore-Common-MIB

frameInternetworking

OBJECT-IDENTITY

From IF-MIB

InterfaceIndex

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
OBJECT-TYPE

How to Use in IPNetwork Monitor

Example using aal5VccCrcErrs OID:

Select a Fore Systems (later Marconi) ForeRunner ATM switch (Mercury FUNI/ATM interworking module, AAL5) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type aal5VccCrcErrs into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. The number of AAL5 CPCS PDUs received with CRC-32 errors on this AAL5 VCC at the interface associated with this AAL5 entity. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases between polls, since a rising count of errors, failures, or discards often points to a real underlying problem. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
aal5	1.3.6.1.4.1.326.1.16.5			This MIB module defines the FORE Systems AAL5 and EPD/PPD management interface of the Mercury netmod (FUNI FR/ATM interworking )
aal5VccTable	1.3.6.1.4.1.326.1.16.5.1		not-accessible	This table contains AAL5 VCC performance parameters.
aal5VccEntry	1.3.6.1.4.1.326.1.16.5.1.1		not-accessible	This list contains the AAL5 VCC performance parameters. Entries in this table are indexed by ifIndex assigned to this interface and vpi/vci pairs assigned to this connection by either provisioning or signalling. Since this entry is associated with the netmod/fabric interface, indexes are fabric VPI/VCI and fabric service if index
NUM aal5VccAtmFabServiceIfIndex	1.3.6.1.4.1.326.1.16.5.1.1.1	InterfaceIndex	read-only	ifIndex assigned to this interface.
I32 aal5VccFabVpi	1.3.6.1.4.1.326.1.16.5.1.1.2	Integer32	read-only	vpi assigned to this interface.
I32 aal5VccFabVci	1.3.6.1.4.1.326.1.16.5.1.1.3	Integer32	read-only	vci assigned to this interface.
C32 aal5VccCrcErrsEx	1.3.6.1.4.1.326.1.16.5.1.1.4	Counter32	read-only	The number of AAL5 CPCS PDUs received with CRC-32 errors on this AAL5 VCC at the interface associated with this AAL5 entity.
C32 aal5VccSarTimeOuts	1.3.6.1.4.1.326.1.16.5.1.1.5	Counter32	read-only	The number of timeouts at the SAR level, waiting for a CPCS trailer
C32 aal5VccOverSizedPDUs	1.3.6.1.4.1.326.1.16.5.1.1.6	Counter32	read-only	The number of AAL5 CPCS PDUs discarded on this ATM VCC at the interface associated with an AAL5 entity due to the AAL5 PDUs being too large.
C32 aal5VccLengthErrPDUs	1.3.6.1.4.1.326.1.16.5.1.1.7	Counter32	read-only	The number of AAL5 CPCS PDUs discarded on this ATM VCC at the interface associated with an AAL5 entity due to the AAL5 PDU length errors.
C32 aal5VccCPIErrs	1.3.6.1.4.1.326.1.16.5.1.1.8	Counter32	read-only	The number of CPI ( Common Part Indicator ) current errors
C32 aal5VccInPDUs	1.3.6.1.4.1.326.1.16.5.1.1.9	Counter32	read-only	The number of AAL-5 PDU's transmitted by the interworking function on this ATM VCC.
C32 aal5VccOutPDUs	1.3.6.1.4.1.326.1.16.5.1.1.10	Counter32	read-only	The number of AAL-5 PDU's received by the interworking function on this ATM VCC.
C32 aal5VccInOctets	1.3.6.1.4.1.326.1.16.5.1.1.11	Counter32	read-only	The number of AAL-5 octets transmitted by the interworking function on this ATM VCC.
C32 aal5VccOutOctets	1.3.6.1.4.1.326.1.16.5.1.1.12	Counter32	read-only	The number of AAL-5 octets received by the interworking function on this ATM VCC.
aal5CpcsCurrTable	1.3.6.1.4.1.326.1.16.5.2		not-accessible	This table holds current ( within the last 15 minutes interval's statistics of AAL5 CPCS sublayer
aal5CpcsCurrEntry	1.3.6.1.4.1.326.1.16.5.2.1		not-accessible	Entry in the table of current statistics of AAL5 CPCS sublayer
NUM aal5CpcsFabServiceIfIndex	1.3.6.1.4.1.326.1.16.5.2.1.1	InterfaceIndex	read-only	ifIndex assigned to this entry.
C32 aal5CpcsCurrCRCErrs	1.3.6.1.4.1.326.1.16.5.2.1.2	Counter32	read-only	The CRC current errors
C32 aal5CpcsCurrSarTimeOuts	1.3.6.1.4.1.326.1.16.5.2.1.3	Counter32	read-only	The current number of Timeouts in the CPCS level, waiting for a CPCS trailer
C32 aal5CpcsCurrOverSizedPDUs	1.3.6.1.4.1.326.1.16.5.2.1.4	Counter32	read-only	The User Payload current errors
C32 aal5CpcsCurrLengthErrs	1.3.6.1.4.1.326.1.16.5.2.1.5	Counter32	read-only	The Length current errors
C32 aal5CpcsCurrCPIErrs	1.3.6.1.4.1.326.1.16.5.2.1.6	Counter32	read-only	The CPI ( Common Part Indicator ) current errors
aal5CpcsIntvlTable	1.3.6.1.4.1.326.1.16.5.3		not-accessible	This table holds interval statistics of AAL5 CPCS sublayer for 8 hour worth 15 minutes intervals. The table is indexed by the service ifIndex as well as interval number in range of 1..32
aal5CpcsIntvlEntry	1.3.6.1.4.1.326.1.16.5.3.1		not-accessible	Entry in the table of interval statistics of AAL5 CPCS sublayer
NUM aal5CpcsIntvlFabServiceIfIndex	1.3.6.1.4.1.326.1.16.5.3.1.1	InterfaceIndex	read-only	ifIndex assigned to this entry.
I32 aal5CpcsIntvlNumber	1.3.6.1.4.1.326.1.16.5.3.1.2	Integer32	read-only	A number between 1 and 32, where 1 is the most recently completed 15 minute interval and 32 is the least recently completed 15 minutes interval ( assuming that all 32 intervals are valid ) .
C32 aal5CpcsIntvlCRCErrs	1.3.6.1.4.1.326.1.16.5.3.1.3	Counter32	read-only	The CRC interval errors
C32 aal5CpcsIntvlSarTimeOuts	1.3.6.1.4.1.326.1.16.5.3.1.4	Counter32	read-only	The interval number of Timeouts in the CPCS level, waiting for a CPCS trailer
C32 aal5CpcsIntvlOverSizedPDUs	1.3.6.1.4.1.326.1.16.5.3.1.5	Counter32	read-only	The User Payload interval errors
C32 aal5CpcsIntvlLengthErrs	1.3.6.1.4.1.326.1.16.5.3.1.6	Counter32	read-only	The Length interval errors
C32 aal5CpcsIntvlCPIErrs	1.3.6.1.4.1.326.1.16.5.3.1.7	Counter32	read-only	The CPI ( Common Part Indicator ) interval errors
aal5CpcsTotalTable	1.3.6.1.4.1.326.1.16.5.4		not-accessible	This table holds cumulative statistics of AAL5 CPCS sublayer
aal5CpcsTotalEntry	1.3.6.1.4.1.326.1.16.5.4.1		not-accessible	Entry in the table of cumulative statistics of AAL5 CPCS sublayer
NUM aal5CpcsTotalFabServiceIfIndex	1.3.6.1.4.1.326.1.16.5.4.1.1	InterfaceIndex	read-only	ifIndex assigned to this entry.
I32 aal5CpcsTotalValidIntervals	1.3.6.1.4.1.326.1.16.5.4.1.2	Integer32	read-only	The number of previous intervals for which valid data was collected. The value will be 32 unless the interface was brought on-line within the last 8 hours, in which case the value will be the number of complete 15 minute intervals since the interface has been online.
C32 aal5CpcsTotalCRCErrs	1.3.6.1.4.1.326.1.16.5.4.1.3	Counter32	read-only	The CRC total errors
C32 aal5CpcsTotalSarTimeOuts	1.3.6.1.4.1.326.1.16.5.4.1.4	Counter32	read-only	The total number of Timeouts in the CPCS level, waiting for a CPCS trailer
C32 aal5CpcsTotalOverSizedPDUs	1.3.6.1.4.1.326.1.16.5.4.1.5	Counter32	read-only	The User Payload total errors
C32 aal5CpcsTotalLengthErrs	1.3.6.1.4.1.326.1.16.5.4.1.6	Counter32	read-only	The Length total errors
C32 aal5CpcsTotalCPIErrs	1.3.6.1.4.1.326.1.16.5.4.1.7	Counter32	read-only	The CPI ( Common Part Indicator ) total errors
aal5EpdPpdVccTable	1.3.6.1.4.1.326.1.16.5.5		not-accessible	A table of statistical information associated with the EPD/PPD controller on a per connection basis.
aal5EpdPpdVccEntry	1.3.6.1.4.1.326.1.16.5.5.1		not-accessible	An entry in the FRAM netmod EPD/PPD statistic information table on a per connection basis
NUM aal5EpdPpdAtmFabServiceIfIndex	1.3.6.1.4.1.326.1.16.5.5.1.1	InterfaceIndex	read-only	ifIndex assigned to this entry.
I32 aal5EpdPpdVccFabVpi	1.3.6.1.4.1.326.1.16.5.5.1.2	Integer32	read-only	vpi assigned to this entry.
I32 aal5EpdPpdVccFabVci	1.3.6.1.4.1.326.1.16.5.5.1.3	Integer32	read-only	vci assigned to this entry.
C32 aal5EpdPpdVccDroppedCellsClp1	1.3.6.1.4.1.326.1.16.5.5.1.4	Counter32	read-only	The total number of dropped cells with CLP=1 by the EPD/PPD controller for a specific connection
C32 aal5EpdPpdVccForwardedCellsClp1	1.3.6.1.4.1.326.1.16.5.5.1.5	Counter32	read-only	The total number of forwarded cells with CLP=1 by the EPD/PPD controller for a specific connection
C32 aal5EpdPpdVccDroppedCellsClp0	1.3.6.1.4.1.326.1.16.5.5.1.6	Counter32	read-only	The total number of dropped cells with CLP=0 by the EPD/PPD controller for a specific connection
C32 aal5EpdPpdVccForwardedCellsClp0	1.3.6.1.4.1.326.1.16.5.5.1.7	Counter32	read-only	The total number of forwarded cells with CLP=0 by the EPD/PPD controller for a specific connection

RFC description

Fore Systems ATM AAL5 adapter configuration and statistics for cell segmentation/reassembly on ATM networks.

Start monitoring Fore Systems (later Marconi) ForeRunner ATM switch (Mercury FUNI/ATM interworking module, AAL5) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download Fore-aal5-MIB